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Fabrication of Au-AlAu4-Al2O3 superhydrophobic surface and its corrosion resistance

机译：Au-Alau4-Al2O3超疏水表面的制备及其耐腐蚀性

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摘要

Superhydrophobic Au-AlAu4-Al2O3 surfaces have been successfully fabricated on aluminum substrate via immersion in chloroauric acid (HAuCl4) aqueous solution and subsequent annealing treatment. The morphologies of the surfaces exhibit dendritic structures. The surface with remarkable superhydrophobic properties has a water contact angle of 171 +/- 2 degrees and a sliding angle of approximately 0 degrees. The effects of the immersion time, immersion concentration, annealing time and annealing temperature on surface wettability were investigated in detail. The corrosion resistance of the untreated aluminum surface and the resulting Au-AlAu4-Al2O3 surface were also investigated via the Tafel extrapolation method. The corrosion current densities are reduced by more than 1 order of magnitude for the resulting surface in comparison with the untreated aluminum surface. The anticorrosion properties of the surfaces get better over the immersion time and this may be due to the generation of corrosion products, which can prevent the corrosion process and protect the substrates. Moreover, the low current density of the resulting superhydrophobic surface demonstrates its excellent corrosion resistance.
机译：超疏水性Au-Alau4-Al2O3表面已经通过浸入氯真酸（HauCl4）水溶液和随后的退火处理中成功地制造在铝基板上。表面的形态表现出树枝状结构。具有显着的超疏水性能的表面具有171 +/- 2度的水接触角，并且滑动角度约为0度。详细研究了浸渍时间，浸渍浓度，退火时间和退火温度的影响。还通过Tafel外推法研究了未处理的铝表面和所得的Au-Alau4-Al 2 O 3表面的耐腐蚀性。与未处理的铝表面相比，腐蚀电流密度减小了所得表面的1多个幅度。表面的防腐特性在浸入时间内越来越好，这可能是由于产生腐蚀产品，这可以防止腐蚀过程并保护基材。此外，所得超疏水表面的低电流密度显示出其优异的耐腐蚀性。

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  • 来源
    《RSC Advances》 |2015年第20期|共8页
  • 作者

    Cheng Yuanyuan; Lu Shixiang; Xu Wenguo; Wen Huidong;

  • 作者单位

    Beijing Inst Technol Sch Chem Beijing 100081 Peoples R China;

    Beijing Inst Technol Sch Chem Beijing 100081 Peoples R China;

    Beijing Inst Technol Sch Chem Beijing 100081 Peoples R China;

    Beijing Microelect Technol Inst Beijing 100076 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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